using System.Windows;
using System.Windows.Controls;
using ytLive.ViewModels;

namespace ytLive.Controls;

public partial class OverlayHost : UserControl
{
    public OverlayHost()
    {
        InitializeComponent();
#if DEBUG
        // Development affordances are added at runtime, never declared in XAML: the panel is
        // excluded from the Release compile (ytLive.csproj), so this line is the only
        // reference to it and a Release build has none.
        DeveloperPanelHost.Children.Add(new DeveloperPanel());
#endif
    }

    /// <summary>Is the enlarged brand-logo preview showing? Test seam — a Popup is a separate
    /// window, so nothing else can observe it.</summary>
    internal bool IsBrandLogoPreviewOpen => BrandLogoPreviewPopup.IsOpen;

    /// <summary>Hover opens the enlargement. Nothing to show when no image is set, so the
    /// thumbnail simply does nothing in that case.</summary>
    private void BrandLogoThumb_MouseEnter(object sender, System.Windows.Input.MouseEventArgs e)
        => OpenBrandLogoPreview();

    /// <summary>Leaving the thumbnail closes it — unless the pointer walked onto the popup
    /// itself (which sits beside it), where it stays put so the creator can look closely.</summary>
    private void BrandLogoThumb_MouseLeave(object sender, System.Windows.Input.MouseEventArgs e)
    {
        if (BrandLogoPreviewPopup.Child?.IsMouseOver == true) return;
        CloseBrandLogoPreview();
    }

    /// <summary>A click collapses the enlargement — the explicit "enough, thanks" gesture.</summary>
    private void BrandLogoThumb_Click(object sender, System.Windows.Input.MouseButtonEventArgs e)
        => CloseBrandLogoPreview();

    private void BrandLogoPreviewPopup_MouseLeave(object sender, System.Windows.Input.MouseEventArgs e)
        => CloseBrandLogoPreview();

    /// <summary>The thumbnail is hidden when no image is set (see the XAML), so there is nothing
    /// to open in that case — no empty frame can appear.</summary>
    internal void OpenBrandLogoPreview() => BrandLogoPreviewPopup.IsOpen = true;

    internal void CloseBrandLogoPreview() => BrandLogoPreviewPopup.IsOpen = false;

    private void BackToAbout_Click(object sender, RoutedEventArgs e)
    {
        if (DataContext is MainViewModel vm)
        {
            vm.IsLicensesOpen = false;
            vm.IsLicenseEntryOpen = false;
        }
    }
}